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https://issues.apache.org/jira/browse/HADOOP-12542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Nauroth updated HADOOP-12542:
-----------------------------------
Attachment: HADOOP-12542.001.patch
I'm attaching a patch. [~arpitagarwal], would you mind reviewing this?
There are 2 causes for the test failures. First,
{{TestDNS#getLoopbackInterface}} was using the friendly display name of the
interface instead of the interface name. This didn't seem to cause problems on
any of my *nix environments, but on Windows, the loopback interface has a
friendly name that is not the same as the interface name. These snippets from
Scala REPL sessions show the difference. The first is from Mac, and the second
is from Windows.
{code}
scala>
java.net.NetworkInterface.getByInetAddress(java.net.InetAddress.getLoopbackAddress).getDisplayName
ckAddress).getDisplayName
res3: java.lang.String = lo0
scala>
java.net.NetworkInterface.getByInetAddress(java.net.InetAddress.getLoopbackAddress).getName
ckAddress).getName
res4: java.lang.String = lo0
{code}
{code}
scala>
java.net.NetworkInterface.getByInetAddress(java.net.InetAddress.getLoopbackAddress).getDisplayName
res2: java.lang.String = Software Loopback Interface 1
scala>
java.net.NetworkInterface.getByInetAddress(java.net.InetAddress.getLoopbackAddress).getName
res3: java.lang.String = lo
{code}
The second problem is that even with the above fixed, there was still a failure
in {{TestDNS#testLookupWithHostsFallback}}. This is because of the infamous
problem we've seen many times before on Windows that it will not resolve
127.0.0.1 to host name "localhost", despite the presence of a correct entry in
the hosts file. The logic of {{DNS#getHosts}} refuses to return an IP address
as a host name, so the test fails on Windows. I used {{assumeTrue}} to skip
this one on Windows.
With this patch, I verified that {{TestDNS}} runs clean on both Mac and Windows.
> TestDNS fails on Windows after HADOOP-12437.
> --------------------------------------------
>
> Key: HADOOP-12542
> URL: https://issues.apache.org/jira/browse/HADOOP-12542
> Project: Hadoop Common
> Issue Type: Bug
> Components: net
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Attachments: HADOOP-12542.001.patch
>
>
> HADOOP-12437 added several new tests covering functionality of resolving host
> names based on an alternate network interface. These tests are failing on
> Windows.
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